My Envy H8-1419 uses the Eyefinity Radeon HD 7570 card. I want to use a Zotac GeForce GTX 650 Ti card (double slot). The card fits physically without difficulty but there is no display on boot (machine beeps, monitor says "no signal"). Desktop seems to meet all requirements re power and system specs. Does something in BIOS need to be reset? Anything else?
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